Erosion Wear Investigation of HVOF Sprayed WC-10Co4Cr Coating on Slurry Pipeline Materials

Kaushal Kumar,Jatinder Singh,Jashanpreet Singh,Gurprit Singh,Satish Kumar

doi:10.3390/coatings7040054

Kaushal Kumar, Jatinder Singh + Show 3 more

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https://doi.org/10.3390/coatings7040054

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Abstract

In the present work, erosion wear due to slurry mixture flow has been investigated using a slurry erosion pot tester. Erosion tests are conducted on three different slurry pipe materials, namely, mild steel, SS202, and SS304, to establish the influence of rotational speed, concentration, and time period. In order to increase erosion wear resistance, a high-velocity oxy-fuel (HVOF) coating technique is used to deposit a WC-10Co4Cr coating on the surface of all piping materials. Experimental results show that rotational speed is a highly-influencing parameter for the erosion wear rate as compared to solid concentration, time duration, and weighted mean diameter. WC-10Co4Cr HVOF coating improved the erosion resistance of piping materials up to 3.5 times. From experimental data, the exponents of solid concentration, velocity, and the size of particles are calculated for the empirical erosion wear equation. A functional equation of the erosion wear rate is developed. The predicted erosion wear is in agreement with the experimental data and found to be within a deviation of ±12%.

Highlights

Slurry pipelines are used in various industrial applications, such as disposal of waste material, coal ash, and tailing materials [1]
Present study was conducted with the motivation of measuring average erosion wear on Present study was conducted with the motivation of measuring average erosion wear on specimens placed in a horizontal direction
The erosion wear on three different slurry pipe materials, specimens placed in a horizontal direction

Summary

Introduction

Slurry pipelines are used in various industrial applications, such as disposal of waste material, coal ash, and tailing materials [1]. Knowledge, as well as technology, associated with the design and operation of such pipelines is still developing. Many aspects of the design have to be done with the help of semi-empirical correlations based on experimental data. This is due to large number of variable factors involved in the design [2,3,4]. Accurate prediction of erosion wear rate is very important for the slurry pipeline [5,6]. Some investigators have suggested that the erosion wear can be minimizing by using protective coatings on piping materials.

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